This update resolves the issues described in Knowledge Base article 968075 (Forefront TMG, Medium Business Edition):

• Forefront TMG, Medium Business Edition Web proxy and Web publishing listeners may stop accepting new requests after receiving specially-crafted packets.
• Forefront TMG, Medium Business Edition forms-based authentication may allow a browser to be redirected by a malicious Web site to a login form which looks legitimate but is not.

Note: If you install this patch on a computer running a Forefront TMG, Medium Business Edition component such as the management console, but not the Firewall Service, you will not be able uninstall this security update through the Windows user interface. You can uninstall this update using the following command at a command line prompt:
msiexec.exe /l*v+ %windir%\temp\ISA_Uninst_968075.log /i {FAA20DE6-1150-4026-B56A-33E9FFB8DDAD} REINSTALL=ALL MSIPATCHREMOVE={994DFD22-1909-457C-8AE4-80722A6A49B5} /qb

1. Click the Download button on this page to start the download of a component.

2. Do one of the following:
• To start the installation immediately, click Run.
• To save the download to your computer for installation at a later time, click Save.
• To cancel the installation, click Cancel.